Double wall insulated cap

ABSTRACT

The “Double Wall Insulated Cap”, a device that when used will conserve heat in a dwelling. For use mostly to plug a flue pipe opening situated at the exterior wall of a dwelling. By plugging that particular hole usually situated, leading directly out to a chimney bottom with an insulated double walled cap, the insulated cap stops heat from escaping out the hole in the wall and prevents cold air from entering the dwelling, when the heating unit is not in use. 
     It is also effective during hot summer months, when air conditionners are in use, when used it caps hot air out and cold air in. 
     The “Double Wall Insulated Cap” uniquely because of its double wall nature fits to all standard sized flue openings and also at any angle.

FIELD OF THE INVENTION

The present invention generally relates to a wood or combustion stove orfurnace installation, and more particularly, to a double wall insulatedchimney flue pipe, cap, that when used, saves energy both summer andwinter, and entails a double wall feature which accepts all standardsized flue openings.

BACKGROUND OF THE INVENTION

Combustion heating units, such as furnaces or stoves, whether utilizingwood or other forms of fuel to generate heat, all require a smokeevacuation conduit, a flue pipe leading to a chimney, is common place.It is such that these are popular devices for heating in residential andcommercial buildings.

When such a unit is not in use, however, the opening within the unit,connected to a flue leading outside forms a passage, through whichheated air or cooled air can escape from the interior of the building.

A Double Wall Insulated Cap installed anywhere along the flue but mosteffectively at the exterior wall opening to the chimney bottom would beso much more effective than just leaving that open hole.

Few innovations for a quick and easily used flue plug or cap have beenpreviously put forth in prior art. For example, : 2009/0223504A1 toMichael A. Williams Douglasville, Ga. Discloses a “device of preparingfor an inner fireplace flue plug, that is, it is installed inside afireplace and also as a result of its hanging vertical spring loadedlocking tubular handle, it is limited to vertical installation and use.For example one cannot use it to plug a flue wall hole because theprotruding handle would stick out horizontally and the weight of theshaft and cylinder would always stress downward leading to inefficiency.Also there is no insulation present. Its limited applications make itvery unlike the unique double wall insulated cap with its universalfitting on or in any and all standard sized flue openings. And there areno moving parts within.

Another example, in the case of U.S. Pat. No. 4,194,494 to Cyril Wagner,Deerfield, Ill., discloses a device of preparing for (quote) “afireplace during periods of non-use, the plug has a body, forobstructing the throat, which carries a magnetic means for securing thebody to the throat. The plug further provides a handle for ease ininserting the plug into the throat and an indicating means for theindicating that the plug has been inserted into the throat of thefireplace.” (end quote)Note, this particular device works reasonably well in its limitedcapability or intended use to plug inside the metallic throat of a flueopening inside a fireplace, only. (quote U.S. Pat) “an indicator meansdepending downwardly from the body indicating that the body is in activeposition” (end quote). This featured indicator means is presentprecisely for that reason, that is that it's meant to be placed inside afireplace.Also, the use of magnetic tape or strip employed to hold and affix theplug in place, limits its adaptability and compatibility to ferrousmetals only and not non-ferrous materials like copper, concrete, brick,and stainless steel . . . Also magnets loose magnetism when placed inhot conditions. Who's to say for sure, that when one installs the pluginside the apparent cooled fireplace, that the chimney flue itself iscold? One also notes the presence of polyethylene insulation within theplug, whereas the double wall insulated cap has fire resistantinsulation. Also this unit, this fireplace plug, has a male fitting end,that fits in the flue opening, in the fireplace only. It does not fitover a male fitting that exist outside of a fireplace, such as at theexterior flue wall opening, where the protruding end is crimped andmale, or elsewhere along the line. The Double Wall Insulated Cap fitsover and into all standard size flue openings. The double walls createan enveloping effect with the opposing flue pipe end either crimped ornot, wedged in and seals the connection.The Double Wall Insulated Cap clearly has a more universal and expandedapplications and usefulness. It is intended and created for general fluepipe capping outside the burn unit and not in the fireplace. It'sintended use is at the exterior wall flue opening where it is mosteffective. A hooked hanging handle is also included.Without significant modifications the two U.S. patents stated here asprior art cannot do what the Double Wall Insulated Cap does. It isunique in the industry. One might compare those two devices as footscooters, whereas the Double Wall Insulated Cap is a 10 speed bicycle.They both have wheels and ride forward, but are of significantdifference in what they are, what they do and how they do it.The Double Wall Insulated Cap has a broader use and is useful, efficientand unique.

Therefore, a heretofore unaddressed need still exists in the art toaddress the aforementioned deficiencies and inadequacies.

SUMMARY OF THE INVENTION

In one aspect the present invention relates to a stove or combustionunit flue pipe cap or plug device, to be installed over a flue pipe openend, when the combustion unit is not in use. In one embodiment, the“Double Wall Insulated Cap” device includes a hooked style metal handlefor hanging and storage purposes. It also embodies an inner concentricmetal wall cavity or core, containing two and one half (2 ½) inches offire resistant insulation, and capped with a concentric metal coverplate. A space or gap in between the core and the outer cap wall createsa channel way, where the metal open flue pipe end, slides in and sort ofwedges in and seals the connection.

In one embodiment the “Double Wall Insulated Cap” includes, one standardsize metal, concentric cylindrical unit capped at one end, in otherwords a regularly sold chimney cap (18). Attached is a hooked metalhandle (12) protruding outward from the center. Attached within, isanother concentric cylindrical core wall part (16), of a slightly,smaller diameter, using rivets (17) to secure it inside the cap (18).Two and one half (2 ½) inches of fire resistant insulation (15) is slidinto the core (16) and a concentric end plate (14) caps the core (16)part of the double wall insulated cap (3).

A hole (19) is drilled through the center of both end plates allowingfor a bolt to be inserted through the center of the concentriccylindrical unit, end to end, attaching and tightening all the partstogether by tightening down a few nuts (13) present, all materials usedconsist of high temperature and low rust endurance metals.

These and other aspects of the present invention will become apparentfrom the following description of the preferred embodiment taken inconjunction with the following drawings, although variations andmodification there in may be affected without departing from the scopeof the novel concepts of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings illustrate one or more embodiments of theinvention and, together with the written description serve to explainthe principle of the invention. Whenever possible the same referencenumbers are used throughout the drawings to refer to the same or likeelements of an embodiment, and where in:

FIG. 1 shows a side view of a double wall insulated cap (3), shownhanging on a wall, by the hooked handle (12). Also, another depictionshowing it, from a frontal view inserted in a wall flue, with the handle(12) hanging down.

FIG. 2 shows a sectional, part by part representation of the double wallinsulated cap (3), with the hooked metal handle (12) attached by acenter, long bolt (21). With an inner concentric core (16) attachedwithin a standard flue pipe cap (18) insulation (15) is inserted withinand a cocnetric cover plate (14) is attached via the long bolt (21),inserted through a center axis hole in the cover and tightly tightenedtogether with a nut (13).

DETAILED DESCRIPTION OF THE INVENTION

The present invention is more particularly described in the followingexamples that are intended as illustrative only. Since numerousmodifications and variations there in will be apparent to those skilledin the art. Various embodiments of the invention are now described indetail. Referring to the drawings, like numbers indicate like partsthroughout the views. As used in the description herein and throughoutthe claim that follows. The meaning of “a”, “an”, and “the”, includesplural reference unless the context clearly dictates otherwise. Also asused in the description herein and throughout the claim that follow, themeaning of “in”, includes “in” and “on” unless the context clearlydictates otherwise. Also, in the construction of the invention, allparts are of heat resistant material and are attached by way of eitherrivets and/or center bolt and nuts.

The description shall be made as to the embodiments of the presentinvention in conjunction with the accompanying drawings in FIG. 1-2. Inaccordance with the purposes of this invention, as embodied and broadlydescribed herein, this invention, in one aspect relates to a combustionstove or furnace flue pipe opening cap or plug device. It includes andconsists of the use of a regular popular standard metal chimney flue cap(18) or a similar cylinder, a hooked metal handle (12) is attached atthe center of the cap and protruding outward from the center. The handle(12) is attached to a long center bolt (21), which is inserted throughthe unit at the center end to end and slightly protruding out at theother end to accept a tightening nut (13).

An inner concentric metal cylinder (16) is fitted within the cap (18),being of smaller diameter than the standard cap (18) it forms the corebody walls (16) in which fire retardant insulation (15) is inserted. Theinner core wall (16) enables the double wall featured characteristic ofthe double wall insulated cap, and provides a channel gap of air inbetween this inner wall (16) and the regular standard outer cap wall(18) which in turn enables the opposing flue connection end, to slide inenveloping and seals the connection wall.

A concentric cover plate (14) is fitted on the long bolt (21) over thecore (16), only covering the insulation (15) but revealing thesurrounding gap channel in between the double walls, which accepts theinsertion of the opposing flue pipe end. This is unique and has a muchwider scope and usefulness than a single wall cap.

The embodiments were chosen and described in order to explain theprinciples of the invention and their practical application so as toenable others skilled embodiments and with various modifications as aresuited to the particular use contemplated. Alternative embodiments willbecome apparent to those skilled in the art to which the presentinvention pertains without departing from its scope. Accordingly thescope of the present invention is defined by the intended claim ratherthan the foregoing description and the exemplary embodiments describedtherein.

I claim:
 1. A double wall insulated chimney flue pipe cap, sealingdevice that fits on any and all standard flue pipe open ends, to be usedduring periods of heating unit non-use, comprising: a a cylindricalmetal cap (18), open at one end, and covered at the other end by aconcentric flat metal plate; b a hooked handle (12), protruding outwardfrom the center capped end, for hanging and storage purposes, andattached to a center bolt (21), which is inserted through the unit atthe center, end to end, protruding out the other end to accept a fewtightening nuts (15), and a cover plate (14); c an inner concentricmetal cylinder (16) fitted within the cap (18), being of smallerdiameter than the standard cap (18), it forms the core body wall (16),in which fire retardant insulation (15) is inserted, the inner core wall(16) enables the double wall featured characteristic of the double wallinsulated cap, and provides a slight channel gap of air in between thisinner wall (16) and the regular cylindrical outer cap wall (18), whichin turn enables the opposing flue connection end, to slide in, and sealthe connection wall; d a concentric cover plate (14) is fitted on thelong bolt (21), over the core (16) only, covering the insulation (15)but revealing the surrounding gap channel in between the double walls,which accepts the insertion of the opposing flue pipe end, this isunique and has a much wider scope and usefulness than a single wall cap.